Study of active screen plasma processing conditions for carburising and nitriding austenitic stainless steel

Corujeira Gallo, Santiago and Dong, Hanshan 2009, Study of active screen plasma processing conditions for carburising and nitriding austenitic stainless steel, Surface and coatings technology, vol. 203, no. 24, pp. 3669-3675, doi: 10.1016/j.surfcoat.2009.05.045.

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Title Study of active screen plasma processing conditions for carburising and nitriding austenitic stainless steel
Author(s) Corujeira Gallo, SantiagoORCID iD for Corujeira Gallo, Santiago
Dong, Hanshan
Journal name Surface and coatings technology
Volume number 203
Issue number 24
Start page 3669
End page 3675
Total pages 7
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2009-09-15
ISSN 0257-8972
Keyword(s) plasma carburising
plasma nitriding
direct current
active screen
plasma diagnostics
Summary Active screen (AS) is an advanced technology for plasma surface engineering, which offers some advantages over conventional direct current (DC) plasma treatments. Such surface defects and process instabilities as arcing, edge and hollow cathode effects can be minimised or completely eliminated by the AS technique, with consequent improvements in surface quality and material properties. However, the lack of information and thorough understanding of the process mechanisms generate scepticism in industrial practitioners. In this project, AISI 316 specimens were plasma carburised and plasma nitrided at low temperature in AS and DC furnaces, and the treated samples were comparatively analysed. Two diagnostic techniques were used to study the plasma: optical fibre assisted optical emission spectroscopy, and a planar electrostatic probe. Optimum windows of treatment conditions for AS plasma nitriding and AS plasma carburising of austenitic stainless steel were identified and some evidence was obtained on the working principles of AS furnaces. These include the sputtering of material from the cathodic mesh and its deposition on the worktable, the generation of additional active species, and the electrostatic confinement of the plasma within the operative volume of the furnace.
Language eng
DOI 10.1016/j.surfcoat.2009.05.045
Field of Research 091207 Metals and Alloy Materials
0306 Physical Chemistry (Incl. Structural)
0912 Materials Engineering
0204 Condensed Matter Physics
Socio Economic Objective 869999 Manufacturing not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2009, Elsevier
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Document type: Journal Article
Collections: Institute for Frontier Materials
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